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Add rendering functions for dotted and dashed underline.

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Dashed underline looks pretty good regardless of conditions, but the
dotted underline only looks good/correct on certain font-sizes. This is
due to the underline being rendered on a per cell/glyph basis (so one
can not place a dot directly between two letters, say. Could be remedied
by pulling the rendering of the underlines into the shader, but that is
more work.
This commit is contained in:
Joseph Adams 2022-01-17 13:25:08 +01:00
parent a2c4f830b3
commit e86c7d668c
1 changed files with 16 additions and 1 deletions
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17
kitty/fonts/render.py
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@ -279,6 +279,21 @@ def add_curl(buf: CBufType, cell_width: int, position: int, thickness: int, cell
add_intensity(x, y1 + t, 255) add_intensity(x, y1 + t, 255)
def add_dots(buf: CBufType, cell_width: int, position: int, thickness: int, cell_height: int) -> None:
y = 1 + position - thickness // 2
for i in range(y, min(y + thickness, cell_height)):
for j in range(0, cell_width, 2 * thickness):
buf[cell_width * i + j:cell_width * i + min(j + thickness, cell_width)] = [255] * min(thickness, cell_width - j)
def add_dashes(buf: CBufType, cell_width: int, position: int, thickness: int, cell_height: int) -> None:
halfspace_width = cell_width // 4
y = 1 + position - thickness // 2
for i in range(y, min(y + thickness, cell_height)):
buf[cell_width * i:cell_width * i + (cell_width - 3 * halfspace_width)] = [255] * (cell_width - 3 * halfspace_width)
buf[cell_width * i + 3 * halfspace_width:cell_width * (i + 1)] = [255] * (cell_width - 3 * halfspace_width)
def render_special( def render_special(
underline: int = 0, underline: int = 0,
strikethrough: bool = False, strikethrough: bool = False,
@ -313,7 +328,7 @@ def render_special(
t = underline_thickness t = underline_thickness
if underline > 1: if underline > 1:
t = max(1, min(cell_height - underline_position - 1, t)) t = max(1, min(cell_height - underline_position - 1, t))
dl([add_line, add_line, add_dline, add_curl, add_line, add_curl][underline], underline_position, t, cell_height) dl([add_line, add_line, add_dline, add_curl, add_dots, add_dashes][underline], underline_position, t, cell_height)
if strikethrough: if strikethrough:
dl(add_line, strikethrough_position, strikethrough_thickness, cell_height) dl(add_line, strikethrough_position, strikethrough_thickness, cell_height)